ascension vs surfacing

ascension

noun
  • The act of ascending; an ascent. 

  • A transcendence of the material world; a transition to a higher form, state, or plane of existence. 

  • That which rises, as from distillation. 

surfacing

noun
  • The act of coming above the surface. 

  • Material used to make a surface. 

How often have the words ascension and surfacing occurred in a corpus of books? (source: Google Ngram Viewer )